Settings stored in ThirdPartySettings can become incorrect

The ThirdPartySettings can be incorrect.
For example:

"" => array:2 [
    "top" => ""
    "options" => array:3 [
      66 => "66"
      20 => "20"
      30 => "30"
    ]
  ]

So the key is empty.

This can happen when the new select component is created in a way that it is submitted without a title. Webform returns an error about supplying a title and key, but I think that by then this bad entry is already created. Furthermore even after specifying the values, the code will save it to this empty keyed section and not the right section, so when editing the component the price values are not correct.

This can fix itself though when the component is opened again, and resaved.

The other issue is that the element's data is not removed from the ThirdPartySettings when they are deleted, so if there are a lot of editing on the webform, data can stay behind. It is a smaller issue, as a new element with the same machine name will replace the data, and otherwise it only considers the submitted data.